Hey, so there were quite a few songs I've used, I'll list them all and provide YouTube links so you can go through to get the ones that you were looking for.
Menu screen: OMORI OST- 004 Spaces In-between
Hospital room: Eternal.Temp Bathroom: six forty seven by instupendo but you’re in a chamber (slowed) Flower room: nevermind, everything's ok Outside: Yume Nikki OST - Snow World If I've missed anything, let me know and I'll link you the song. And sorry I've gotten rid of the game, but hopefully you can be satisfied with the music. :)